INTRODUCTION
A number of organisations have made observations of radioactive
fallout from the bursts in the Pacific Proving Ground. As there has
apparently been no previous collection of this information, this
report attempts to gather together the fallout data from and near
Bikini and Eniwetok atolis. The upper wind data appropriate for the
study of the close-in fallout from each of the bursts is also given.
There sre uncertainties in interpreting soma of the fallout
_. Measurements and in the choice of the appropriate wind date, but
it is felt that this swanary might be useful in the forthcoming
Redwing series.
work.
Joint Task Force 7 provided the financial support for this
FALLOUT DATA
Tables 1 and 2 describe the bursts considered in this report.
Figures 1 and 2 show the location of the islands in Eniwetok and
Bikini atolls, respectively, as well as the berge station numbers
and locations for ths CASTL! series.
For each of the bursts, @ map is showm (Figures 3-1) which
gives the following information: (1) the dose rate measurements
converted to H + 12 hours in miliiroentgens per hour, from the
various sources as identified below; (2) the approximate time of the
measurement in hours or days after the explosion, in parenthesis,
as (H + 3) or (D+ 2)3 (3) a set of nwsbers indicating approximate
average arrival time (in hours after the explosion) of the fallout - in
circles where the time was estimated from the fallout plot and in
squares where it was based on actual measurements; (4) an analysis
of the total dose from time of fall to infinity, in roentgens; and
(5) a waighted hodograph for a particle which takes one hour to fall
from 35,000 to 5,000 feet, (a particle 291 microns in diameter if
spherical and of specific gravity 2.5).
GREBHOUSE
Figures 3-6 are for the GREENHOUSE serles.
in preparing these maps sre as follows:
a.
The reports used
WT-89 - Scientific Director's Report, Annex 3.3,
Radiological Safety. All four shots were monitored *
from helicopters.
Although the readings may have ul